Vala 0.54.1
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 * Regression and bug fixes:
  - codegen:
    + Add type declaration for implicit temporary local variable
    + Sealed class in external package is not special [#1229]

 * Bindings:
  - gstreamer: Update from 1.19.0+ git master
  - gtk4: Update to 4.5.0~3e20ecd6